Worked on enhancing container networking in the containerd/containerd repository by developing CNI v2 loopback capabilities, including a new loopback-v2 binary and comprehensive integration tests to verify loopback interface status within containers. Updated build tooling and installation scripts to streamline deployment of these features, leveraging Go, Shell scripting, and networking expertise. Additionally, contributed to pytorch/pytorch by fixing a concurrency bug in backend registration, improving correctness in concurrent programming paths using C++. Addressed code readability and naming consistency in metrics tests, supporting maintainers with focused code reviews and validation checks to reduce regression risk and improve code maintainability across both projects.